Digital Broadcasting Transission/Reception System Capable of Improving Receiving and Equalizing Performance and Signal Processing Method Thereof

Abstract

A digital broadcast transmitting and receiving system and a signal processing method thereof that improves the receiving performance of the system. A digital broadcast transmitter includes a randomizer to receive and randomize a data stream into a specified position of which stuff bytes are inserted, a replacement sequence generator to generate known data including a predefined sequence, a stuff-byte exchange unit to insert the known data into the specified position of the data stream into which stuff bytes are inserted, an encoder to encode the data stream output from the stuff-byte exchange unit for an error correction, and a transmission unit to modulate the encoded data stream, RF-convert the modulated data stream and transmit the RF-converted data. The digital broadcast receiving performance is improved even in an inferior multi-path channel by detecting the known data from the received transmission and using the known data for synchronization and equalization in a digital broadcast receiver.

Description

TECHNICAL FIELD [0001] The present invention relates to a digital broadcasting transmission / reception system, and more specifically, to a digital broadcasting transmission / reception system generating stuff byte in a Moving Picture Experts Group-2 transport stream (MPEG-2 TS), and operating and transmitting a pattern of known data using the stuff byte to improve reception performance and equalization performance of a reception system and a signal processing method thereof. BACKGROUND ART [0002] The Advanced Television Systems Committee Vestigial Sideband (ATSC VSB) method, a U.S-oriented terrestrial waves digital broadcasting system, is a single carrier method and uses a field sync by 312 segment unit. Accordingly, reception performance is not good in poor channels, especially in a Doppler fading channel. [0003]FIG. 1 is a block diagram of a transmitter / receiver of a general U.S-oriented terrestrial waves digital broadcasting system according to the ATSC digital television (DTV) stan...

AI Technical Summary

Benefits of technology

[0027] According to the present invention, a digital broadcasting transmitter generates and inserts stuff bytes in an MPEG-2 TS packet and transmits the inserted stuff bytes as known data, and a digital broadcasting receiver detects and uses the known data so that the digital broadcasting reception performance can be improved in poor multipath channels.

[0028] In addition, a sequence of the known data is manipulated in a pattern to improve performance of the equalization so that equalization performance and reception performance can be improved.

Problems solved by technology

Accordingly, reception performance is not good in poor channels, especially in a Doppler fading channel.

This is not frequent so that the capacity to remove the multipath and equalize the received signal using this is low.

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